Hickory — Trees in the genus Carya (from Ancient Greek kary “nut”) are commonly known as Hickory. The genus includes 17-19 species of deciduous trees with pinnately compound leaves and large nuts. A dozen or so species are native to North America (11–12 in the United States, 1 in Mexico), and 5–6 species from China and Indochina. Another Asian species, …

Hemlock — Tsuga is a genus of conifers in the family Pinaceae. The common name hemlock is derived from a perceived similarity in the smell of the crushed foliage to that of the unrelated herb poison hemlock; see hemlock for other senses of the word. Unlike the herb, the species of Tsuga are not poisonous. There are between eight and …

Heather — Calluna vulgaris is the sole species in the genus Calluna in the family Ericaceae. It is the true Heather of Europe, and National Flower of Norway. However it also has an affiliation to Scotland. It is a small perennial shrub growing to 20-50 cm tall (rarely to 1 m), and is found widely in Europe and Asia Minor …

Hackberry — Hackberry (Celtis) is a genus of about 60-70 species of deciduous trees widespread in warm temperate regions of the Northern Hemisphere, in southern Europe, southern and eastern Asia, and southern and central North America, and south to central Africa. The genus is present in the fossil record at least since the Miocene of Europe. They are generally medium-sized …

Goldenrod — The goldenrod is a yellow flowering plant in the Family Asteraceae. About 100 perennial species make up the genus Solidago, most being found in the meadows and pastures, along roads, ditches and waste areas in North America. There are a handful of species from each of Mexico, South America, and Eurasia. Some American species have also been introduced …

Goldenrain Tree — Goldenrain tree (Koelreuteria paniculata, Pride of India, or China tree) is a species of Koelreuteria native to eastern Asia, in China and Korea. It is a small to medium-sized deciduous tree growing to 17 m tall, with a broad, dome-shaped crown. The leaves are pinnate, 15-40 cm (rarely to 50 cm) long, with 7-15 leaflets 3-8 cm …

Gentian — Gentiana is a genus of flowering plants belonging to the Gentian family (Gentianaceae), tribe Gentianeae and monophyletic subtribe Gentianinae. This a large genus, with about 400 species. This is a cosmopolitan genus, occurring in alpine habitats of temperate regions of Asia, Europe and the Americas. Some species also occur in northwest Africa, eastern Australia and New Zealand. They …

Gardenia — Gardenia is a genus of about 250 species of flowering plants in the family Rubiaceae, native to the tropical and subtropical regions of Africa, southern Asia, Australasia and Oceania. The genus was named by Carl Linnaeus after Dr Alexander Garden (1730-1791), Scottish-born American naturalist. They are evergreen shrubs and small trees growing to 1-15 m tall. The leaves …

Foxglove — Digitalis is a genus of about 20 species of herbaceous perennials, shrubs, and biennials that was traditionally placed in the figwort family Scrophulariaceae. Due to new genetic research, it has now been placed in the much enlarged family Plantaginaceae. The genus is native to Europe, western and central Asia, and northwestern Africa. The members of this genus are …

Forsythia — Forsythia is a genus of flowering plants in the family Oleaceae (olive family). There are about 11 species, mostly native to eastern Asia, but one native to southeastern Europe. The common name is also Forsythia; the genus is named after William Forsyth. They are deciduous shrubs growing to 1–3 m (rarely 6 m) tall, with rough grey-brown bark. …